ReadyRegex is designed as a simple app that can be used to learn more about Regular Expressions, or Regex for short.
Regular Expressions are an invaluable tool that you can use to search for specific patterns of text within a large volume of text. This can be useful, for example, if you have a large number of log files and you need to pull out every occurrence of an IP address for analysis.
ReadyRegex includes a dictionary, so that you can look up the tokens you need to design the Regex string you need. It also provides some examples and explanation of how to construct a Regex and a live testing utility.